Reversing-valve



(No Model.) 2 Sheets-Sheef 1,v A. L. ENGBLBAOH.

REVBRSING VALVE.

No. 434,328. Patented Aug'. 12. 1890.

w/TNESSES A TTORNEYS 2 sheets-sheen 2.

(No Model.)

A. L. BNGBLBAGH.' RBVBRSING VALVE.

No'. 434,328. Patented Aug. 12.17890.

/NVENTOH w/r/vEssEs.-

UNITED STATES PATENT OFFICE.

AUGUSTUS L. ENGELBAOH, OF LEADVILLE, COLORADO.

SPECIFICATION forming part of Letters Patent No. 434,328, dated August12, 1890.

Application led January 28, 1890. Serial No. 838,329- (No model.)

To all whom it may concern: .y

Beit known that I, AUGUSTUS L. ENGEL- BACH, of Leadville, in the countyof Lake and State of Colorado, have invented a new and Improved Valvefor Steam-Engines, of which the following is a full, clear, and exactdescription.

The obj ect of the invention is to provide a new and improvedsteam-engine valve which is simple and durable in construction, veryeffective in operation, and permits of quickly reversing the engine atany time.

The invention consists of aslide-valve and a semi-cylindricalvalve-seat,on which the said slide-valve operates and which is mountedto be turnedin the steam-chest.

The invention also consists of certain parts and details andcombinations of the same, as will be hereinafter fully described, andthen pointed out in the claims.

Reference isto bev had to the accompanying drawings, forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure lis a sectional side elevation of the improvement as applied. Fig. 2 is a transverse section of the same, on the line c :c of Fig. l.Fig. 3 is a plan view of the steam-chest and cylinder. Fig. 4 is a planview of the valve-- seat. Fig. 5 is an inverted plan view of the same.Fig. 6 is a transverse section of the same on the line y yof Fig. 4.Fig. 7 is 'a like View of the same on the line c ,e of Fig. 4, and Fig.8 is a similar view of the same on the line w "w of Fig. 4.

In the steam-engine cylinder A, is held to slide, in the usual manner,the piston B, se curedon thepiston-rod C. On the top ofthe cylinder Aisarranged asteam-chest D, provided with a semi-cylindrical bottom E, inwhich is held to turn the similarly-shaped valve-seat F, on the iiat topof which is mounted to slide longitudinally a slide-valve G, heldinplace at the sides by the ribs and flanges F', projecting from the sidesof the valve-seat F. The slide-valve G is provided at its under sidewith theusual cavity G, and receives a sliding motion by being connectedwith the valve-stem H by means of collars l, fitting against the raisedends of the slide-valve G, so as to permit the latter to change itsposition sidewise without interfering in the least usual manner, fromthe main driving-shaft of 5 5 the engine.

In one end of the valve-Seat F is secured a shaft J, which extends in anopposite direction to the valve-stem H, and is placed in axial line withthe latter. The short shaft J passes through suitable stufling-boxes inthe end of' the steam-chest D, and carries on its outer end a lever K,on which is pivoted a small hand-lever L, connected with a pin N, heldto slide in the lever K- and adapted to engage one of the apertures Oand O2, formed in the segmental plate O, secured by a suitable bracketor other means to the top of the Steam-chest D. As shown in Fig. 2, thepin N engages the aperture O, and when live steam isadmitted to thesteam-chest D the engine runs in one direction; but Whenthe operatordesires to reverse the engine he presses on the lever L, so as todisengage the pin N from the aperture O, and moves the lever K in thedirection of the arrow Xuntil ythe pin N registers with the aperture O2and engages the latter, so that the lever K is locked in place.

The arrangement of the several ports is as follows: From the outer endof the cylinder A, at one side, leads a port a, which extends under thesemicircular bottom E of the steamchest D, and connects with theinterior of the latter by ports a and a2, extending in line with eachother, as is plainly shown in Fig. 3. From the inner end of the cylinderA leads a port b, which extends longitudinally under the semicircularbottom E of the said chest D, and connects with the latter lby tho portsb and b2, located opposite the ports a2 y and a', respectively, andextending in line with each other. adapted to register alternately,according to the direction in which it is desired to run the engine,with the ports c and c2, formed in the under side of the valve-seat Fand leading to the port c', leading to the top of the valve-seat, andover which operates the slidevalve G. Over the ports a2 and b operatethe ports d2 and d', respectively, also formed in the valve-seat Fandleading to a common port d, extending to the top of the seat F, and overwhich operates the slide-valve G.

The ports a and b2 are IOC Between the ports c and d in the seat F isarranged the exhaust-port c, which extends from the top of the valve toone side, to connect with a port f, leading to the exhaustpipe Q, overwhich is arranged the steaminlet pipe P, leading to the top of thesteamchest D. The slide-valve G in its forward and backward motionalternately connects the port c with the port c and the port d with theport e in order to exhaust.

iThe operation is as follows: lVhen the lever K engages with its pin Nthe aperture O in the segmental plate O, then the valve-seat F stands inthe position shown in Fig. 2, in which the port c2 registers with theport b2, while the port c is closed. At the same time the port d2registers with the port c2, while the port d is closed. Now, when thesteam is admitted through the inlet-pipe P into the interior of thesteam-chest D, then the steam first passes through the port c (see Fig.l) and the port b2 into the port b and to the inner end of the cylinder,thus exerting pressure against the piston B and forcing the same in theinverse direction ot' the arrow X. The exhaust in front of the piston Btakes place through the port a, the port a2, the port d2, and the portd, and from the latter past the cavity G in the slide-valve G totheexhaustport e, which latter at all times connects with the exhaustportf, leading to the exhaustpipe Q. Before the piston B has reached the endof its stroke the position of the slidevalve G changes, so that the portd becomes uncovered and steam from the steam-chest now passes throughthe ports d and cl2, through port aginto the longitudinal port a, whichleads to the outer end of the cylinder, so that the piston ,B is forcedon its return-stroke in the direction of the arrow X. The exhaust at theother side of the piston now takes place through the ports Z1 b2 d2 d,the cavity G in the slide valve G to the exhaust-port e, and through theport f tothe exhaust-pipe Q. Now, when the operator desires to reversethe engine at any timehe simply changes the position of the lever K, asabove described, so that the valve-seat F turns in the bottom E of thesteam -chest D, carrying with it the slide-valve G, which now remainsconnected with its valve-stem I'Las the axis of the movenient ot' thevalve-seat F is in line with the axis of the valve-stem II. Thus theslidevalve G does not necessarily interrupt its travel while thereversing takes place. The changing of the valve-seat F connects theport d with the port b and the port c with the port a', while the portscl2 and c2 remain closed. Steam from the steam-chest D now passes, whenthe several parts are in the position shown in Fig. l, through the portc, the port c to the port a', which leads the steam to the outer end ofthe cylinder, so as to force the piston B in the direction of arrow X.lVhen the position of the valve G changes, then the steam passes throughthe ports d, CZ', and b into the longitudinal port b and to the innerend of the cylinder A. The exhaust takes place in a similar mannerthrough the same ports, only in reverse order. Thus it will be seen thatby merely changing the position of the valve-seat F the en gine isreversed without interrupting even the movement of the slide-valve G.

-I-Iaving thus described my invent-ion, what I claim as new, and desireto secure by Letters Patent, is-

l. In a valve for steam-engines, the combination, with a slide-valve, ofa valve-seat mounted to turn in the steam-chest to adapt its upper faceupon which the said valve slides to be set at an angle, substantially asdescribed.

2. In a valve for steamengines, a semicircular valve-seat provided withdouble sets of inlet-ports and mounted to turn in the steamchest,substantially as shown and described.

3. In a valve for steam-engines, the combination, with a semicireularvalve-seat provided with double inlet-ports, a single exhaust-port, andmounted to turn in the steamchest, of an ordinary slide adapted totravel on the fiat top of the said Valve over the said ports,substantially as shown and described.

4. In avalve for steam-engines, the combination, with the ordinaryslide-valve anda valve-stem loosely connected with the said slide-valve,of a semicircular valve-seat on which the said slide-valve is mounted toslide, the axis of the said valve-seat being in line with the saidvalve-stern, substantially as shown and described.

5. In a valve for steam-engines, the combination, with the ordinaryslide-valveand a valve-stein loosely connected with the saidslide-valve, of a semicircular valve-seat on which the said slide-valveis mounted to slide, the axis of the said valve-seat being in line withthe said valve-stein, and ribs or flanges extending longitudinally onthe sides of the said valve-seat to hold the said slidevalve in place,substantially as shown and described.

6. In a valve for steam-engines, the combi nation, with the ordinaryslide-valve and a valve-stem loosely connected with the saidslide-valve, of a semicircular valve-seat on which the said slide-valveis mounted to slide,

the axis of the said valve-seat being in line with the said valve-stem,the valve-seat being provided with an exhaust-port and two sets ofinlet-ports, substantially as shown and described.

7. In a valve for steam-engines, the combination, with the ordinaryslide-valve and a valve-stem loosely connected with the saidslide-valve, of a semicircular valve-seat on which the said slide-valveis mounted to slide, the axis of the said valve-seatbeing in line withthe said valve-stem, the said valve-seat being provided with anexhaust-port and two sets of inlet-ports, and means, substantially asdescribed, for shifting the position of the said valve-seat, as setforth.

IOO

IZO

8. The combination, with a cylinder provided with two inlet-portsleading from oppo` site ends of the cylinder and each having two branchports arranged in line with each other, and a steam-chest havingasegmental bottom into which open the two branch ports, of asemicircular valve-seat fitted into the semicircular bottom of the saidsteam-chest and provided with inlet-ports, each having two branch portsadapted to alternately register with the branch ports of thecylinder-ports, substantially as shown and described.

9. The combination, with a cylinder provided with two inlet-portsleading from opposite ends of the cylinder and each having two branchports arranged in linewith each other, and a steam-chest having asegmental bottom into which open the two branch ports, of a semicircularvalve-seat fitted into the semicircular bottom of .the said steam-chestand provided with inlet-ports, each havingtwo branch ports adapted toalternately register with' the branch ports of the cylinder-ports, and aslide-valve held to slide on the top of the said valve-seat and providedwith the usual cavity for connecting the said inlet-ports alternatelywith the exhaust-port in the said valveseat, substantially as shown anddescribed.

10. The combination, with a cylinder provided with two inlet-portsleading from opposite ends of the cylinderand each having two branchports arranged in line with each other, and a steam-chesthavingasegmental bottom into whichopen the two branch ports,ofasemicircular valve-seat fitted into the seinicircular bottom of thesaid steam-chest and provided with inlet-ports, each having two branchports adapted to alternately register with the the position of the saidvalve-seat, substantially as shown and described.

11. The combination, with a cylinder provided with two inlet-portsleading from opposite ends of the cylinder and each having two branchports arranged in line with each other, and a steam-chest having asegmental bottom into which open the twobranch ports, of a semicircularvalve-seat fitted into the semicircular bottom ot the said steam-chestand provided with inlet-ports, each having two branch ports adapted toalternately register with the branch ports of the cylinder-ports, aslidevalve held to slide on the top of the said valve` seat and providedwith the usual cavity for connecting the said inlet-ports alternatelywith the exhaust-port in the said valve-seat, a shaft extending from oneend of the said valve-seat and having its axis in line with the stem ofthe slide-valve, a lever held on the outer end of the said shaft forchanging the Y position of the said valve-seat, and means, substantiallyas described, forlocking the said lever in place when shifted,substantially as shown and described.

AUGUSTUS L. ENGELBAOH. Witnesses:

ALBERT S. BLAKE, DANIEL SAYER.

